After seven consecutive years of waking up on opening day as a head coach, Jim Fassel now starts his second season as a Baltimore assistant. "It is different because that's what I did for so many years," Fassel told The Post from his office at Ravens headquarters. "But I have a job to do right now and I'm really having fun. I'm trying to help this offense improve and working with a good friend [Brian Billick]." While Fassel was reticent to discuss the head-coaching prospects in his future, The Post visited with several NFL types and found that the former Giants coach is expected to be in the running for several potential job openings. Rumors out of Tampa Bay have Jon Gruden in his last season unless he can get the Bucs into the playoffs. Fassel, who worked with Bucs GM Bruce Allen while both were with the Raiders, has already been mentioned as a possibility to take over.